LONDON—U.K. Treasury chief Philip Hammond is planning to say Wednesday that the British government believes it is in the interest of the European Union to include financial services in a free-trade deal with the U.K. after Brexit, a day after his French counterpart ruled it out.
The disagreement underscores what is set to be a major sticking point between Britain and the EU when talks over the U.K.’s withdrawal move on to the terms of its future relationship from the bloc. The EU is due to publish its draft guidelines for...